X x x x x



2 Sheets-Sheet i.

' 'MILLINGTON & GEORGE.

Dividing Engine.

Patented Aug. 8, 1854.

No. 11,489. v

2 Sheets-Sheet 2.

MIALLINGTON &,GEORGE.

Dividing Engine.

Patented Aug. 8,1854;

Squares, Rules Sicf; and we do: hereby de- ,clare thatthe following isa;fulland exact T 0 all 'whom "it may concern:

Be it known that we, NORMAN MILLING-- AQ T NT OFFICE.

MILLINGTQN AND D. J. GEORGE, or sHAr'rsBuRY; VERMONT.

MACHINE FOR GRADUATING CARPENTERS SQUARES.

Specification, forming part of Letters Patent No. 11,489, dated August8, 1854; Reissuedl August i i i 22,1871, NO. 4,523. i i i Ton and DENNISJ, GEORGE, of Shaftsbury, in the county .of Bennington and State ofVermont, have inventeda new and Improved Method of Graduating Carpentersdescription thereof, reference being had to the accompanying drawingsand the letters and figures marked thereon.

The nature of our invention consists in providing for the commoncarpenters square, two feet long) twentyzfour gravers,

about four inches long, firmly set in metallic handles, about twentyinches long, and at; tached to a rod, about one fourth the dis? tancefrom the front end of the handles, the rear ends being adjusted byscrews and springs; These handles are placed side by: side one inchapart from center to center I andarefattached to a carriage about onefoot wide and two feetlong,wh1ch slides laterally (suflicientto make thelongest cross- 5 mark) on waysand is pressed forward, to cut the marks,by a wheel, in the rear, have {1 1g on; its peripherya succession; ofeighti cams (to dividetheinch into eighths), the

:highest point of each rising to the sanie plane, but differingindepthto give the desired length of inark to each of the severaldivisions of the inch. The square to be graduatedis confined to thefront rail, of a carriage directly under the points of the gravers,which is noved at right angles from themotionof thegravers by aninclined plane if and the motions of the two carriages so ar-' ranged,that as often as the square is pressed forwardone eighth by the inclinedplane each of the gravers cuts at the proper place the desired crossmark, for the inchha1f,l

quarters and eighthse and as there are twenty four gravers, eachgraduating one inch, the whole square is completed whilst 1 the squaremoves longitudinally but a 1 single inch. But to enable others skilledin the art,

to make anduseour said invention, we will proceed to give a moreparticular description of itsconstruction and operation The accompanyingdrawings,which make a part of this specification and tofwhichreferenceis made, are as follows, viz: No. 1, an,

isometrical delineation ofthe machine; No.

2,,ase ction of the machine with the graversi and: their carriageiremoved; N013, theisui-Q e cine mm w l; hl isll t ams :which all theparts are attached' CLthe carriage on which the square is confined forgraduating; G, the graver carriage, to which the gravers are attached,slides lat-.

erally on ways, being drawn back by the spring I, into the spacesbetween the cams to begin each mark at the proper distance from theedge, for each division of the inch, and is pressed forward by the cams(which the points of the gravers across to the front edge of the square;I, the spiral spring connected to the rear edge? of the graver carriageG, and back side of the bed piece jall rise to the same plane) so as tobring F,Yto drawback the points of the gravers g,

from the edge of thesquare; R, the rod on the: front side of the gravercarriage G, to

,which'the graver handles H, are attached by the universal joint a; V,the balance frame, balancing at its center on the rear 1 rail ofthegraver carriage G, so that the gravers will cut the same depth on thethin as on the thick end of the tape square; 3:, -the screws and springsstanding perpendicularlyin the balance frame V, to adjust the pressureofthe rear end ofthe graver handles; e, the guides attached to the crossbar 6, in frontof the balance frame V, having, slots at the front endftoreceive the spurs on the top of handles and screws by which the graversare raised or depressed; b, thecrossbarin front of the balance frame(cut out in the drawing) H,fthe

graver handles (see No. 4) :turning on: the rod R, and adjustable at therear end by the guides e, andhspiral springs and screws o; g, thegraverssmall square rodsabout 4 inches long, placed cornerwise under,and

projecting a little beyond, the front of the handles, to which they arefirmlyattached by loop bolts, the rear end being raised to anangle of 24from the bed piece; u, the

universal joint (see No. 4) connecting the graver handles H, to; therodfR; W, the cam wheel on the cam shaft S, on the peripheryof which isa series of cams (see No. 8) all rising to the same plane, but ofdifierent depths, to make the marks of the proper length to eachdivision of the inch,

,.L, the large gear on the cam shaft making one revolution to 8 of thedriver shaft D;

E, the elliptical cam on the driver shaft (see No. to raise and sustainthe square, on the front of the carriage, by the agency of, the arm a,while the marks are being cut; P, a small pinion on the driver shaft D,so graduated as to make eight revolutions while the cam shaft S, makesbut one; a, an arm attached to the carriage C, and

' passing under the elliptical cam E, to raise the square to'the pointsof the gravers to receivethe marks; T, the tappet wheel on the end ofthe cam shaft S, on the periphery of which are as many tappets orprojections, save one, as you design to divide the inch into equalparts, which tappets acting on the rear end of the pawl X, move forwardthe ratchet a" and inclined plane 11; X, the pawl hung in the rear, near'the tappet wheel, by'which it is moved forward, the

front end resting on the detent d, and

ratchet v; d, the detent, hung to the arm g, under the pawl X, andresting in the ratchet 4), one tooth in rear of the pawl, to detain theratchet when the pawl is lifted and while the gravers are cutting; A,the slide, moving longitudinally on the outside of the bed piece F, onthe inner edge of which the inclined plane 2', and the ratchet o, areattached; it is moved forward by the pawl X, and brought back to itsstarting point by a spring; 1;, the ratchet, attached to theinner edgeof the slide A; z, the inclined plane on the'inner edge of theslide A,is

pressed against the end of the rock shaft 0, and moves the carriage C,and square longitudinally to measure the successive division of theinch; 0, the long rock shaft,

supporting the back side of the carriage C, and on which the carriagerocks laterally to raise the square up to the points of the gravers onslides longitudinally pressed by the inclined plane 2', at everysuccessive division of the inch; n, the short rock shaft projecting fromunder the side of the bed piece F, and having two arms, one on the outand the other on the inside rail of the bed piece F, standing nearly atright angles, by the agency of which the pawl X and detent (Z, areraised from the ratchet, and the slide is drawn back by a spring; m, anarm on the outside of the short rock shaft 07/, the top being cut to anangle of some 45 to slide under a lifting pinin the back side of thedetent and raise both the detent and pawl, from the ratchet and holdthem till the inclined plane i, is brought back to its starting point;72., an adjustable upright slide, moving up and down on the front h; 70,a friction roller on the rear rail of the graver carriage G, to reducethe friction of the cam wheel W; D, the driver shaft; f, rod connectingarms m, and m of rock shafts n and n I Note-Each different style offinishing squares will require a cam wheel with different depths ofcams, and these may be placed side by side on the cam shaft and movedand keyed to act on the friction roller at pleasure. I

Operation :The several parts of the machine' being arranged as aboyedescribed and the square being confined on the front side of thecarriage C, by clamps, or otherwise and the driver shaft D, being put inmotion.

The cam E, by the agency of the arm a,

presses up the square against the points of the gravers till the springsat the rear of the graver handles bear with suflicient force to mark thesquare. The deepestrcamon the cam wheel W, (which gives'the inch mark)bears againstthe rear of the carriage C, moving all the gravers andmaking all the inch marks on the edge at once. The lowest plane of thecam E, being at the bottom side,

the front of the carriage C falls from the points of the gravers. Thetappetvcam now presses against tlie rear end of the pawl which, restingin the ratchet a", drivesfor-' ward the inclined plane 2' against theend, 7 of the rock shaft 0, and moves the square longitudinally oneeighth of an inch. The next cam on the wheel designedto makethe eighthmark (the shortest on the equare) is. produced by the same operation asthe inch 7 mark, above described, as are also all the passes under thepin 2, which pressesdown the slide, and being connected with-the arm m,raises the pawl X and-detent d, from'the ratchet 1", and allows both theinclined plane 2' and carriage O, to slide back to their startingpoints, when the square is removed and another confined :to thecarriage. C. The work is done with accuracy and in one sixth timerequired to do it by hand gravers.

What we claim as our" invention and 'desire to secure by LettersPatent,is;

1. Thearrangement in" a'single frame substantially as set forth, ofas-many gravers as there are units to be divided, so as by the actionofthe cam wheel W or its equivalent,

simultaneously to trace, of the proper length, each set of division andfractional lines:

by a cam, or otherwise, all the several parts,

or their equivalents to be arranged and combined as above specified, orin any other manner substantially the same, which shall 15 produce theintended efl'ect.

NORMAN MILLINGTON. DENNIS J. GEORGE.

Witnesses:

J OHN HASTINGS, CHARLES E. HOUGHTON.

[Fms'r PRINTED 1913.]

